@interface _GKBlockRule : GKRule { id /* block */ _predicate; id /* block */ _action; } - (void).cxx_destruct; - (BOOL)evaluatePredicateWithSystem:(id)a0; - (id)initWithPredicate:(id /* block */)a0 action:(id /* block */)a1; - (void)performActionWithSystem:(id)a0; @end